Materials Literature
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As a new racemic gelator, 2-acryloylamide-dodecane-1-sulfonic acid (ADSA) was observed to form an organogel with chloroform and tetrahydrofuran. Transmission electron microscopy (TEM) observation for the stained gel from chloroform revealed helical ribbons. Templated by these, both right- and left-handed silver nanohe…
Abstract A room‐temperature aqueous‐chemical route has been developed to synthesize a high proportion (above 80%) of bamboo‐raft‐like bismuth nanotube arrays using bismuth chloride and metallic zinc powder as reagents. The prepared Bi nanotubes have uniform diameters of approximately 3−5 nm and lengths from several hu…
A systematic approach is suggested for predicting the solubility of sparingly soluble solid fine chemicals and pharmaceuticals. The procedure uses group contribution methods for computing the difference in solubility at infinite dilution in the solvent of interest from an optimal reference solvent with the aim of (1)…
Abstract Microcellular plastics (MCP) refer to any plastic with tiny bubbles of less than about 50 microns. It is made by subjecting polymers with a large amount of dissolved gas to a thermodynamic instability so as to nucleate a large number of cells instantaneously. MCP has been extruded and injection molded to make…
ABSTRACT Modern rail grinding practices have developed largely through a combination of field experience and intuitive speculation. Many theories related to crack initiation and growth have been proposed through the decades, and those concepts have been cleverly extended to the field of rail grinding to form the basis…
The hydrothermal stability of the collagen matrixes treated with plant polyphenols (tannins) depends on not only the strength of the polyphenol-collagen interactions but also the distribution uniformity of polyphenolic molecules within the collagen fibrils. Traditional methods of uniformity tests rely heavily on the e…
On the basis of the difference in meso-13C chemical shifts, we have concluded that the intermediate-spin iron(III) complexes with highly ruffled and highly saddled porphyrins have different electron configurations. While the latter has a conventional (dxy)2(dxz, dyz)2(dz2)1, the former adopts a novel (dxz, dyz)3(dxy)1…
A process to manufacture porous oxide matrix/polycrystalline oxide fiber composites was developed and evaluated. The method uses infiltration of fiber cloths with an aqueous slurry of mullite/alumina powders to make prepregs. By careful manipulation of the interparticle pair potential in the slurry, a consolidated slu…
Abstract Direct visualization of crystal growth in poly( L ‐lactide) thin films was carried out by using a temperature‐controlled atomic force microscopy (AFM). At the initial stage of crystallization, edge‐on lamellar crystals have nucleated and elongated. Subsequently, the edge‐on lamellar crystals showed S‐shaped m…
Abstract Using standard and temperature‐modulated differential scanning calorimetry, we have studied the segmental relaxation behavior of montmorillonite‐epoxy nanocomposites. The experimental results showed that the incorporation of clay particles caused the epoxy network to exhibit slower relaxation dynamics compare…
Organic derivatives of the protonated triple-layered perovskite HCa 2 Nb 3 O 10 · x H 2 O with n -alkoxyl groups on the interlayer surface have been prepared by grafting n -alcohols. Interlayer surface modification of HCa 2 Nb 3 O 10 · x H 2 O is achieved by a direct reaction of HCa 2 Nb 3 O 10 · x H 2 O with methanol…
Abstract Sodium, lithium, and calcium soaps obtained by saponification of high‐oleic sunflower oil were studied by Fourier‐transform infrared spectroscopy. Spectra of crude mixtures containing soap, glycerin, residual alkali, and triacylglycerols were compared to those of pure soaps obtained from fatty acids. The infr…
Crosslinking of collagen biomaterials increases their resistance to degradation in vivo. Glutaraldehyde (GA) is normally used to crosslink collagen biomaterial, but is often cytotoxic. Diphenylphosphoryl azide (DPPA) has recently been proposed as reagent, but little is known about its effects on cell behavior. In this…
Abstract Phase transitions in the BaAl 2 O 4 –SrAl 2 O 4 solid solution have been analysed as a function of temperature and composition using infrared (IR) powder absorption spectroscopy. The improper ferroelectric phase transition P 6 3 22 → P 6 3 (2A superstructure) in the BaAl 2 O 4 end-member can be detected throu…
In the present work, we analyze the radiative and nonradiative recombination channels in $\ensuremath{\alpha}$-PTCDA (3,4,9,10-perylene tetracarboxylic dianhydride) by applying time-resolved photoluminescence (PL) techniques in the 50 ns range between temperatures of $T=10\mathrm{K}$ and $T=300\mathrm{K}.$ The obtaine…
Different anticancer drugs, farmorubicin, doxorubicin, paclitaxel and cis-platin have been conjugated through a Gly-Phe-Leu-Gly tetrapeptide side chain to a water-soluble synthetic polymeric carrier based on N-(2-hydroxypropyl)methacryalmide (HPMA) non-targeted or targeted with galactosamine and/or human IVIg and used…
Puncturing polymer membranes: Non-wetting organic liquids (see scheme; red) can form a mesoscopic wetting layer on a water surface (light blue), if they are mixed with suitable particles (dark blue). Photochemical cross-linking of the liquid in the mixed layer and transfer to metal grids or porous supports produces co…
We derive a general upper bound on the spreading rate of wavepackets in the framework of Schrödinger time evolution. Our result consists of showing that a portion of the wavepacket cannot escape outside a ball whose size grows dynamically in time, where the rate of this growth is determined by properties of the spectr…
Mesenchymal stem cells (MSCs) were isolated from the bone marrow of rats and seeded into a nonwoven fabric of polyethylene terephtalate (PET) by agitation and static methods. MSC attachment was investigated in terms of the number of cells attached to the fabric, their distribution inside the fabric, and cell damage. T…
A structural investigation of composite films of self-assembling stearate ions (C18) in layered double hydrotalcite clay (LDH) was carried out by means of X-ray diffraction (XRD) analysis, gas chromatography (GC), elemental analysis, thermogravimetry (TG), differential thermal analysis (DTA), and inductive coupled pla…